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1 | #ifndef __NET_FIB_RULES_H |
2 | #define __NET_FIB_RULES_H | |
3 | ||
4 | #include <linux/types.h> | |
5 | #include <linux/netdevice.h> | |
6 | #include <linux/fib_rules.h> | |
7 | #include <net/flow.h> | |
8 | #include <net/netlink.h> | |
9 | ||
10 | struct fib_rule | |
11 | { | |
12 | struct list_head list; | |
13 | atomic_t refcnt; | |
14 | int ifindex; | |
15 | char ifname[IFNAMSIZ]; | |
16 | u32 pref; | |
17 | u32 flags; | |
18 | u32 table; | |
19 | u8 action; | |
20 | struct rcu_head rcu; | |
21 | }; | |
22 | ||
23 | struct fib_lookup_arg | |
24 | { | |
25 | void *lookup_ptr; | |
26 | void *result; | |
27 | struct fib_rule *rule; | |
28 | }; | |
29 | ||
30 | struct fib_rules_ops | |
31 | { | |
32 | int family; | |
33 | struct list_head list; | |
34 | int rule_size; | |
35 | ||
36 | int (*action)(struct fib_rule *, | |
37 | struct flowi *, int, | |
38 | struct fib_lookup_arg *); | |
39 | int (*match)(struct fib_rule *, | |
40 | struct flowi *, int); | |
41 | int (*configure)(struct fib_rule *, | |
42 | struct sk_buff *, | |
43 | struct nlmsghdr *, | |
44 | struct fib_rule_hdr *, | |
45 | struct nlattr **); | |
46 | int (*compare)(struct fib_rule *, | |
47 | struct fib_rule_hdr *, | |
48 | struct nlattr **); | |
49 | int (*fill)(struct fib_rule *, struct sk_buff *, | |
50 | struct nlmsghdr *, | |
51 | struct fib_rule_hdr *); | |
52 | u32 (*default_pref)(void); | |
53 | ||
54 | int nlgroup; | |
55 | struct nla_policy *policy; | |
56 | struct list_head *rules_list; | |
57 | struct module *owner; | |
58 | }; | |
59 | ||
60 | static inline void fib_rule_get(struct fib_rule *rule) | |
61 | { | |
62 | atomic_inc(&rule->refcnt); | |
63 | } | |
64 | ||
65 | static inline void fib_rule_put_rcu(struct rcu_head *head) | |
66 | { | |
67 | struct fib_rule *rule = container_of(head, struct fib_rule, rcu); | |
68 | kfree(rule); | |
69 | } | |
70 | ||
71 | static inline void fib_rule_put(struct fib_rule *rule) | |
72 | { | |
73 | if (atomic_dec_and_test(&rule->refcnt)) | |
74 | call_rcu(&rule->rcu, fib_rule_put_rcu); | |
75 | } | |
76 | ||
77 | extern int fib_rules_register(struct fib_rules_ops *); | |
78 | extern int fib_rules_unregister(struct fib_rules_ops *); | |
79 | ||
80 | extern int fib_rules_lookup(struct fib_rules_ops *, | |
81 | struct flowi *, int flags, | |
82 | struct fib_lookup_arg *); | |
83 | ||
84 | extern int fib_nl_newrule(struct sk_buff *, | |
85 | struct nlmsghdr *, void *); | |
86 | extern int fib_nl_delrule(struct sk_buff *, | |
87 | struct nlmsghdr *, void *); | |
88 | extern int fib_rules_dump(struct sk_buff *, | |
89 | struct netlink_callback *, int); | |
90 | #endif |